title: Reliability and validity of the Japanese semistructured interview version of the Early Signs Scale (ESS-JI) for outpatients with schizophrenia (study 1).
abstract: The purpose of this study was to develop a semistructured interview for the Japanese version of the Early Signs Scale (ESS-JI), as well as to examine its reliability and validity. We conducted a cross-sectional study in Japan. Participants were recruited from a psychiatric clinic. The survey included 25 participants with schizophrenia; of these, 21 participants gave informed consent. For the analysis, we used data from 15 outpatients who had no missing values on the ESS-JI. Of the participants, 70% were female, and the mean age was 41.2 years. The ESS-JI was developed by the authors using a translation-back-translation procedure. Internal consistency was assessed by Cronbach's alpha coefficients, and test-retest reliability was assessed by Pearson's correlation coefficients. Correlations with other scales, such as the Behaviour and Symptom Identification Scale (BASIS-32) and the Self-Efficacy for Community Living Scale (SECL), were used to examine the concurrent and construct validity of the ESS-JI. Cronbach's alpha coefficients were high for the ESS-JI. Pearson's correlation coefficients also indicated good test-retest reliability. The ESS-JI was significantly and positively correlated with the BASIS-32. In contrast, the ESS-JI had a significant negative correlation with the SECL. This study confirmed the reliability and validity of the ESS-JI for outpatients with schizophrenia.
authors.affiliation: Department of Psychiatric and Mental Health Nursing, International University of Health and Welfare, Kanagawa, Japan. koichi-tky@umin.ac.jp
authors.forename: Rieko
authors.initials: R
authors.lastname: Koichi
authors.forename: Yuki
authors.initials: Y
authors.lastname: Miyamoto
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D042241:Early Diagnosis; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D011569:Psychiatric Status Rating Scales / Q000592:standards*; D015203:Reproducibility of Results; D012559:Schizophrenia / Q000175:diagnosis*; D012565:Schizophrenic Psychology; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires